Built By Data: NFL Helmet Innovation
Are lighter football helmets safer? Carlsbad company banking on it - The San Diego Union-Tribune
Helmet Innovation: More and Better Choices, Fewer Concussions
Helmet manufacturers, coaches try to protect players with advanced technology
N.F.L. Will Allow Six Social Justice Messages on Players' Helmets - The New York Times
American football is too dangerous, and it should be abolished, Dave Bry
The Extra Yard: The Ins and Outs of an American Football Helmet - Stories
At Last, Football Faces Concussion Problems Head-On : NPR
NFL hopes to reduce head injuries with helmet experiment, FOX 4 Kansas City WDAF-TV
Accelerometers Could Finally Fix the NFL's Concussion Crisis
Experimental Helmet Aims To Fix Football
Light helmet design's effectiveness pits company versus NFL, NFLPA and their testing - The Athletic
Helmet market, with deep Detroit ties, in arms race
Can high-tech helmets solve football's thorniest problem?